function g1w() {
    document.getElementById("explain_1").innerHTML= "说明：图书馆书目检索系统，可查找图书馆馆藏的印刷版文献资源";
}
function g2w() {
    document.getElementById("explain_1").innerHTML= "说明：查找中文电子资源，包括电子图书、电子期刊";
}
function g3w() {
    document.getElementById("explain_1").innerHTML= "说明：查找外文电子资源，包括电子图书、电子期刊";
}
function g4w() {
    document.getElementById("explain_1").innerHTML= "说明：通过百度学术搜索检索学术资源";
}
function g5() {
    document.getElementById("explain_1").innerHTML= "说明：支持按照作者、题名、关键词检索";
}
var si = 1;
function xiaoshi(){       
    if(si == 1){
   document.getElementById("sousuo_2").value="";
     }
   si = si + 1 ;
}
var t = 0;
function hidden1() { 
    t++; 
    if(t%2 == 1 ){
     var ui = document.getElementById("hidden_1");
     ui.style.display="none";
    }
    if(t%2 == 0){
    var ui = document.getElementById("hidden_1");
    ui.style.display=""; 
     }
} 

function hidden2(){
    var ui = document.getElementById("hidden_1");
    ui.style.display="none";
}
var re=0;
function rechange1(){
  re++;
  if(re>1){re=1;}
  if(re == 1) {
    document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/烟花三月.jpg\">" ;
    document.getElementById("change_re1").innerHTML= "烟花三月";
    document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/瓦尔登湖.jpg\">" ;
    document.getElementById("change_re2").innerHTML= "瓦尔登湖";
    document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
    document.getElementById("change_re3").innerHTML= "预知梦";
    document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
    document.getElementById("change_re4").innerHTML= "细雪";
              }
   if(re == 0){
    document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/瓦尔登湖.jpg\">" ;
    document.getElementById("change_re1").innerHTML= "瓦尔登湖";
    document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
    document.getElementById("change_re2").innerHTML= "预知梦";
    document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
    document.getElementById("change_re3").innerHTML= "细雪";
    document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/城南旧事.jpg\">" ;
    document.getElementById("change_re4").innerHTML= "城南旧事";
                }
    if(re ==-1){
     document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
     document.getElementById("change_re1").innerHTML= "预知梦";
     document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
     document.getElementById("change_re2").innerHTML= "细雪";
     document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/城南旧事.jpg\">" ;
     document.getElementById("change_re3").innerHTML= "城南旧事";
     document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/手机.jpg\">" ;
     document.getElementById("change_re4").innerHTML= "手机";
    }
  
}
function rechange2(){
    re--;
    if(re<-1){re=-1;}
    if(re == 0){
    document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/瓦尔登湖.jpg\">" ;
    document.getElementById("change_re1").innerHTML= "瓦尔登湖";
    document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
    document.getElementById("change_re2").innerHTML= "预知梦";
    document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
    document.getElementById("change_re3").innerHTML= "细雪";
    document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/城南旧事.jpg\">" ;
    document.getElementById("change_re4").innerHTML= "城南旧事";
    }
    if(re == 0){
        document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/瓦尔登湖.jpg\">" ;
        document.getElementById("change_re1").innerHTML= "瓦尔登湖";
        document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
        document.getElementById("change_re2").innerHTML= "预知梦";
        document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
        document.getElementById("change_re3").innerHTML= "细雪";
        document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/城南旧事.jpg\">" ;
        document.getElementById("change_re4").innerHTML= "城南旧事";
                    }
        if(re ==-1){
         document.getElementById("changep_re1").innerHTML= "<img src=\"../../static/images/预知梦.jpg\">" ;
         document.getElementById("change_re1").innerHTML= "预知梦";
         document.getElementById("changep_re2").innerHTML= "<img src=\"../../static/images/细雪.jpg\">" ;
         document.getElementById("change_re2").innerHTML= "细雪";
         document.getElementById("changep_re3").innerHTML= "<img src=\"../../static/images/城南旧事.jpg\">" ;
         document.getElementById("change_re3").innerHTML= "城南旧事";
         document.getElementById("changep_re4").innerHTML= "<img src=\"../../static/images/手机.jpg\">" ;
         document.getElementById("change_re4").innerHTML= "手机";
        }
    
}



